And what about being bored with "burying the brain once the body is dead", eh? Maybe some fundamentals do brook change, eh?

Of course they do. But again:

But this is a rather over-specific interpretation of the emotional and I would argue even rationalist core of the poem. Namely that being bored with "water will wet us" and "fire will burn" causes major problems since wishful thinking quickly works to disconnects us from viable strategies in reality.

We are significantly and systematically biased in how we evaluate if the fundamentals have changed.

This is the point of the poem as I read it.